Dihydropyridines antihypertensive drugs belong to calcium channel blockers, which are commonly used clinically, including nifedipine controlled-release tablets, amlodipine besylate tablets, levamlodipine besylate tablets, felodipine tablets, felodipine extended-release tablets, nifedipine extended-release tablets, nifedipine tablets, lacidipine tablets, nimodipine, etc., mainly through the expansion of smooth muscle of arteries to play the efficacy of improving blood supply to organs and lowering blood pressure, mainly for the treatment of Medium and severe hypertensive people, suitable for elderly hypertensive patients with severe vascular sclerosis, for renal substantial hypertension, also has a good effect, the effect of lowering blood pressure is exact, the drug effect time is smooth. Dihydropyridine antihypertensive drugs, can cause the following adverse reactions: 1, gingival hyperplasia, gum swelling; 2, facial redness, swelling, local edema; 3, edema of the extremities; 4, blood pressure decreased, reflexly caused by increased heart rate; 5, inhibit the heart function, leading to the aggravation of heart failure, need to be noted when using. The above side effects will be relieved soon after stopping the drug.